. >> investigators are focused on james holmes' apartment, safely and strategically removing booby traps. they say they hope they have removed the remaining threats but it will not know for sure until they get inside. once it is deemed safe, detectives will try to determine a motive for the horrible shooting. >> anything that is in there we will be using as evidence, so we will be cautious. >> with assistance from the fbi and the atf, the police say they have successfully removed the tripwire leading into the apartment of shooting suspect james holmes. they also used controlled that nations to take out incendiary devices. >> whoever was going to come to the scene was going to be a police officer, ok? make no mistake what was going on. if you think we are angry, we sure as hell are. >> he is described as a loner but also brilliant, recently withdrawn from a ph.d. program in colorado. >> he showed no emotion standoffish, and really did not talk to many people. >> he had no criminal record other than a speeding ticket, but he started to assemble weapons two months ago everything bought lega